morgan



` E. c. MORGAN MINING MACHINE oct. 7 1924.. 1,510,628

@riginal Filed July 6, 1914 9 Sheets-Sheet l Der. 7,1924.'

1,516,628 E. uMoRGAN MINING MACHINE Original Filed July 6, 1914 l l /j f f /f\ 9 Sheets-Sheet 2 IX. m1

E. c. MORGAN MINING MACHINE oct. 7, 1924; 1,510,628.

original Filed July e., 1914- 9 sheets-sheet 5 l I nl I l u f E. CMOR'GAN MINING MACHTNE Oct.. 7 1924.

9' Sheets-Sheet 4 original Filed July 6, y1914 Oct. 7 1924. 1,510,628

E. C. -MORGAN MINING MACHINE Original 'Filed July 6, 1914 9 Sheets-Sheet 5 Oct. 7 1924.

E` C. MORGAN MINING MACHINE Original Filed July 6, l9-14 QSheets-Sheet 6 w um. Q uw E. c. MORGAN MINING MACHINE 4 Original Filed July 6, 1914. 9 Sheets-Sheet 7 Oct; 7 1924.

' v c. MORGAN.

MINING MACHINE original Filedauly e', 1914 9 sheets-sheet e y Jaz/@524 M9356@ 1M/wad JOyQ/z/ Cf] i 1 Cet.' 7, 1924. 1,510,628

, E. 'El MORGAN MINI-NG MACHINE original Filed Julyl e, 1914, s sheets-Sheet 9 Patented oa. 7, 1924.

m JVZ iii .1 .-Vf ai. 'fi-1.; .i/Hlp EDMUND o. MORGAN, onNEWvoitn, N. v o nrvn MORGAN EXEcUTR-IX oF sAIn nniviUNn c. MORGAN, nncnnsnn.

MINING MAeIiiNn.

` 'tbiieatitn'nle .fury 6,1914, saisine. Maori. neiiei'va siainiter e, iai-ei.

tainnewyand useful Improvements in Miningllachinesj of which the following is a speciiiciation. l l

v.invention' relates to improvements in ng'inachines and has more particular chines for mining coal andthe like.

One wofthe objects of my invention is to provide an vimproved machine of this char acter which will be simple, durable and re liablein construction and leffective and etilcient in operation., l

ects ot my invention will appear hereinafter. l

Referring l to the accompanying drawings Fig." l r is asubstalntially cent-ral vertical longitudinal section, some ot' the parts being shown in elevation, of an improved mining machine embodying 'my invention7 the machine being illustrated in. the act of cutting a'blockot coal from a vein of Coah Figure?J is a. view `similar to Fig. 1 illustrating Sonie lof the parte in a'different position a'nd'in the actofmremoving and dischargingthe'blocks of coal which it has out.

Fig.v 3 is a rear end elevation of the ma chine shown in Figs. l and 2. f f

Il isa transverse sectional view on the linee-.4L of Fig. l..

,Figg' is another transverse vert-ical section on theline fof Figjl, v

Fig. 6 is a substantially,horizontal section on lthe line 6`6 of Fig. l looking downwardly. y

Fig. 7 is ya substantially horizontalsection on the line 7 -7'9'15 ll looking upwardly.

8 is horizontal section on. the line 8- 8, of Fig. l showing the details ofthe cutter driving and shifting mechanism.

Fig. 9. is ran enlarged detail section on the lineQfQ of Fig, l looking upwardly and showing-,the construction and operation oi one of the kerit cutting mechanisms. y

Fig.` l()y is( a section onmthe curved line 10e-v10 of Fig. l looking downwardly.

`Fig. l1 is, a ltransverse.' detail section on the iin@ 11T-11 .of Fig-...1o.

Fig. l2 is a tra" sverse detail section on the sei-iai saaieez.

linej 1.2 212 of Fig. l, showingithe driving mechanism for the lower cutting mechanism. Fig. l'is a detail. view partly inseotion on the line 41 3--13 of Fig. l, showing further details of said driving mechanism. l Fig. le isy an enlarged detail view inrelevation of a portion orN the kei-it cutting chain or" the upper kerf cutting1nechanism.`

Fig. l5 isa longitudinal vsectionl of said chain on theflinel-.l Aof le. y

F ig. l6'is a detail transverse section on the linelG-l of Figl. .Q F ig; 1'1"' is an enlargeddetail onthe line lf-Tlof Fig. 2 illnstrating'one of thegrip# pers for grippingthe block of coal which has just beencut andwhich istobe removed bythe shiftingv of the keril cutting` mechanism.

Fig. lSis `an enlarged detailof a slightly modiedtorm of Abrake mechanism for the lower swinging cutting mechanism.

ig. 19de an enlargeddetail of anrecha nism which yieldingly tends to Aswing the lower cutting mechanism to its cutting posi Fe@ is a deeramlmtc, View.. in elevationand partly in crosssection Showingl my improved machine mounted upon a support ing truck.

partly cross-section of modified form of mining machine embodyingthe principles of my invention. l l y gs. ,2 2v to 27 are diagrammatic views illnstrating n iyimproved method ot mining coahligs. 5;J y26 and27 illustrating my improved method of miningunder suchconditions as where several dirty bands exist in the vein.

Fig, 28 is a diagrannnaticview illnstrat-v ing the curves or arcs on which the kerfs are cut to sever the block of coal from thebody of the vein. Y y Fig. 29 is a' perspective view, of .oneof the blocks of coalsevered from the vein by my improved machineA and method, and

Fig. SO is aviewsimilar to Fig. 29 except that it illustrates ablock'ofcoal .cut from a veinin which. a dirtyband existed, such as referred to yin connection with v25 to 27. Itl will be olivvions,v to one skilled in `the art after having obtained an understanding of my invention from the disclosuresv herein Fig. 21 isa view in side. elevation and made, that my invention is capable of being embodied in various modified structures without departing from the scope and spirit ot the invention, and I wish it to be so understood.

It is well known lor various commercial and other reasons that the best results are obtained if coal or similar material is mined in large compact unilorm blocks or sections and my present invention contemplates a method of and machinery for mining coal in blocks or sections of this character.

In the drawings I have illustrated my improved method of cutting the body or vein ol coal into sections or blocks of a uniform size and shape convenient not only for handling and removal from the mine but also transportation and preservation purposes, and I have also illustrated a machine or apparatus which also embodies my invention and which can be used tor carrying out said method. In Figs. 22, 23 and 24 I have illustrated diagrammatically a portion of a mass or vein of coal in which a plurality of kerfs are cut in accordance with my improved method. I-Iere it will be seen that the vein, which is represented by the upper and lower lines l and 2 respectively, has a plurality of kerfs 3 cut therein, these kerfs or cuts 3 being disposed vertically, spacedl apart and disposed parallel with respect to each other. There are alsoI a plurality oi karts 4 the axes of which are at right angles to the vertical kerf 3 and which therefore intersect said kerfs 3, in such manner as to divide the vein into uniform blocks or sections 5 of coal. The kerfs 4 are cut on curved lines which begin at the points 6 in the face or outer wall of the vein of coal and which curve toward the upper or lower lines l and 2, as the case may be, terminating at 7 in intersecting relation to said lines l and 2. These kerfs may be cut in any sequence and in any number desired but I prefer that the curved keri's 4 be cut alternately, that is to say, for instance as illustrated in Fig. 24, the kerfs 4 be cut one at a time, each kerf being cut after a block of coal formed by the preceding keri` has been cut and removed. To make this clearer assuming, as illustrated in Fig. 24, we start with the upper kert 4. This kerf is cut on a curved or arc-shaped line which begins at 6 in the cuter face or wall of the vein and which teru'linates at the upper line l. The block' thus formed is then removed exposing a curved face 8. rlhe block of coal 5 thus severedis then removed and the next alternate kerf 4 is cut in the opposite direction, that is, downwardly toward the line 2, beginning at 9 on the exposed facey 8 made by the previous kerf and terminating at the point l0 in intersection with the lower line 2, thus the upper and lower blocks may be cut alternately and the mining of the coal will be progressive into the vein. In actual practice I prefer to cut a series of upper blocks and remove them and then cut a series or transverse row of lower blocks and remove them and so on progressively into the vein. Fig. 23 illustrates a transverse row of upper blocks above the kerfs 4 just ready to be removed, while Fig. 22 illustrates a reverse row, that is, a row of lower blocks ready to be removed. As before mentioned, in practice I prefer to cut a plurality of blocks in a transverse upper or lower row as the case may be, but in doing this I cut a single upper block and remove it and then cut the next single block in the 'transverse row and remove it and then cut a third single block in the transverse row and remove it, and so on until the desired number of blocks in the particular transverse row has been cut and removed. I then proceed to cut the blocks individually in the neXt transverse row'and remove them one by one until that row is complete and so on alternately and progressively for as long a period of time as desired. The vertical series of ker-fs 3 may of course be cut in any timed relation to the other kerfs as desired, but in practice I prefer to cut them at the same time as I cut the curved kert's 4, and I will presently describe a machine by which my improved method can be carried out in this manner. The curvature or arcs upon which the kerfs 4 are cut depend of course upon various conditions, such for instance as the type of machine used for the purpose, the depth or height of the vein and the size and shape of the blocks.

In the particular exemplifcation of my invention shown in the drawings the curved kerfs 4 for each vertical pair of blocks, so speak, are cut on arcs the centers ol which are vertically separated substantially the height or depth of the vein. This is illustrated diagrammatically in Fig. 28. In this view the lines l and 2 illustrate the top and bottom of the vein as in the preceding vein and the shaded sections 5 represent the two blocks ol" a vertical pair, so to speak. The dotted circles 4a represent the arcs on which the keris 4 are cut. The centers of these circles or arcs are indicated at ll. Thus it will be seen that the centers of the keris 4 of each vertical pair, so to speak, of blocks are vertically separated substantially the distance between the lines l and 2 which correspond to the roof and floor of the mine, The form of block thus severed from the body or vein of coal is illustrated in perspective in Fig. 29. In 'Figs 22, 22% and 24 I have described my invention in connection with the mining of coal wherein the line o cleavage between the vein or strata of coal and the dirt or earth above and Leidse? belovvl the said vein is comparatively clearly defined. In said views this line of cleavage for the roof and door of tlie'miiie is coin',- cident with the lines 1 andk 2.' Under such conditionsy the blocks will readily, break loose along the lines of' cleavage after the lrerlts 3l andX lliave ybeen cut; y,It happens, however, that the line of cleavage isI sometimes indefinite or the thickness Lof thevein varies materially and undei subh Conditions it is advisable to cut another'lterf in order to completely sever "the blocls'of coal from the mass. y In Figs; 25, 26'an`d 2"!" I have illustratedsuch additional kerfls `at`12. This kei-f is of course coincident with the lines 1 and 2 and determines the height of the mine roof from which the blocks aretaken; In other Words, the'kerfslv determine the floor androof line of the mine; The said'kerfs 12 may be cut at any time relatively to the otherlrerfs but in the machine Which I am presently to ,describe I have made provision for cutting the kerfs 12 simultaneously with the other lrerfs Band 4j. Figs. 25 to 27illustrate also` a vein or body of coal having one or more dirty bands strata 13 running through itgt-This', however, does not Iinterfere With the 'carryingout of my method; In fact, with my improved method the coal may be very advantageously mine'djbecause as the blocks are cut they Will in fall likelihood'sever along saidjdirty bandsleaving a number oi'psmaller blocksrand permitting y the ready removal of the dirty band. v Such a' divided block is illustrated in Fig;` l30, this being the same as vthe block illustrated in Fig. 29 except that the dirty band 13 r.has caused a division of the Whole block intotWo sections; f n

The machinel or apparatus V which Vis" illus-4 trated in the remaining drawing has' been designed for carrying out my improved method as just described; Thismachine is' constructed so that itk Willnot only cut all` of the l'erfs simultaneously but it will opera/te to remove the severed blocks as they are cut and thus maintain its path constantly clear of severed blocks to permit itssteady progress into the vein.l In "Figs, 1, 2 and 6 it Will berseen that the operating parts of the machine are all mounted Cupon and supported by a large frame A which rests upon the floor line 2 of the mine. This frame may be mounted upon suitable skids 15 bywhich it may be easily shifted alongthe iioor ory it may be mountedl upon a suitable truck hav ing Wheels or rollers, such as' illustrated' diagrammatically in Fig. 20 and WhichI will describe later. This frame has tvvo long feet or prongs 16 Which project forwardly a considerable distance and serve, in conjunction vvith the main part of the frame, as a lbroadwsolid support for theniachin-i.l

, The rear endfof the lmain frame Ais made inthe form of a large broad hollow'ring 17 frame 18Which is bodily rotatable'in said bearingor journal about anaxiscoincident With the center of 'said bearing'.l Thisssubf frame carries a large curved'receivigichiite" or guide 19 which arches over or around the operating mechanisms and Whichr extends" from the rear of the main 'frame to theffor- Ward end of the machine. This chutezor receiving member merges atA the rear end with the sub-frame 18 which madeholloiv and somewhat' larger in sectionalareai'thaii the chute proper so as yto forni c, tinuous passage for the yblo'clrjsfof lcoal'fiffin the extreme forward end of the chiite to the rear end of the machine. l y

This chute `or guiding member' is preferably rectangular in cross section and its fori Ward end, that is, the plane of vitsr orivard end, is at an angle to the longitudinal airis of rotation of the sub-trame".v It-isfadapted to be positioned close to the ffacevjof the vein or, Wall of coal and is radapted tores ceive from the cutting mechanism blocks of coal which are severedand reriviovedby said cutting mechanism. It isnalsofto bejborh'e' in mind that the `chuteis bodily rotatable with the sub-frame about its hbrilzontlfaiiis so that said chute may be presented tothe Wall of the vein at any angle desired,` aiidyin order that it may be conyeniently rotated' about its axis I provide mechanismfor 'actuating the sub-framey to` accomplishA this purpose. Thus the ring bearing orjournal boring' 17y ofthe main frame, hasan ai'inular y journaled in suitable bearings 23 ig. 5)

and carries a Worm gearA 24 ivhi'cli is driven by a Worm on the' endof anelectrrc'motor shaft 26,' themotor 27 (Fig.v ij'jbeiii'gt suitably mounted o'n said subifaine and controlled in anydesirable manner Well known in theart, Thus'by running the motor in either direction the sub-frame and the chute r19 carried thereby may be readily rotated in either direction about its axis to position said chute in any relative position desired withA respect tothe vein of coal. By the'. provision of a Worm driving 'mechanism such as just described, a lockingm'echanism, so to speak,` is obtained for holding` theA chute in anyv position to which itis rotatedor adjusted. This chute is curved onay prede# termined arc so that it will bein arcuate alignment With the arcuateline of movement ofthe cutting mechanism, for reasons which will hereinafter appear, and the center of this are is disposed preferably as 'close' as conveniently possible,` to the side Walls 'or root or iioor of the mine, asy the case may be, depending upon the' `relative yposition to vwhich um mechanism mj, bminy rcs-mma; The' the letter B, is shown as operating at the forward end of the chute 19 in an arc which is in alignment with the curve of the chute 19. This cutting mechanism in the struc- .ture shown involves a hollow loop-shaped frame 25 around which a cutter chain 26 is disposed and adapted to run (Figs. 1, 2 and 9). This frame is substantially rectangular in shape except that its rear side rreach is slightly curved to provide room for the chain driving and other mechanisms. The cutting` chain is in the form of a continuous loop which is mounted to travel around the peripheral edge of the frame 25 which is farthest from the end of the chute. The cutter frame 25, as clearly shown in the drawings, is hollow or open and is preferably no thicker than the kerf which the chain cuts so that said frame, while it not only supports the cutting chain, will be capable of passing into the kerf in the rear of the cutting chain, thus permitting the cutting mechanism to embrace or pass over the block as the block is cut, and as will later appear, .permitting the block to pass completely through said frame The cutting chain may be of any suitable construction for the purpose. In' the construction shown (Figs. 14, 15 and 16) the chain composed of a plurality of links 30 pivoted or linked together by the bolts or rivets 31. The construction shown in Figs. 14 to 17 inclusive, is covered in my co-pending applications Serial Nos. 848,726 filed July 3, 1914, and 12,760 filed March 8, 1915, and 860,271 filed September 5, 1914. The side members of alternate links have instanding bosses 82 which meet midway of the length of the bolts or rivets 81 and form bearings for the side members of the intermediate links 30a and the side members of the intermediate links 30pt are spaced by rollers 33, thus forming a solid compact chain which is perfectly flexible and still rigid to withstand the strains of service. The rollers 33 run on a flange 25a on the frame which thus provides a substantial bearing for said chain. The intermediate linksB()a have central holes 84 preferably square in rsection to provide suitable sockets for the shanks 35 of the removable cutter blades 36. A portion 37 of the intermediate link projects beyond the confines of the chain laterally and provides a support for a. removable collar 88 having a set screw 39 which passes through the portion 37 and binds the shank 35 of the cutter blades firmly in position. The cutter blades and their Shanks are disposed angularly, alternate blades being disposed in the same direction so that the chain will cut a kerf wider than the chain. In order to prevent the chain from separating or leaving the frame 25 and at the same time permit it to travel freely on said frame, the frame has two grooves .40, (Fig. 17) one groove of which is engaged by small flanges or projections 402L on the links and the other of which is engaged by hook members 41 carried by said chain links, thus locking the chain to the frame.

rl`he cutting mechanism B, as before intimated, swings or moves bodily in an arcuate path which is in alignment with the chute 19 and which determines the shape or curve of the kerfs and hence the block. In order, therefore, that the cutting mechanism may be manipulated in this manner its frame is pivotally mounted on another frame 50 which is supported by the chute 19. This pivotal mounting is obtained by providing the cutting mechanism frame 25 with a pair of lugs 51 (Fig. 8) which are mounted upon a shaft 52 supported in similar lugs 53 on the forward end of the frame 50. This arrangement permits the cutting mechanism frame and cutting mechanism to be bodily swung about the pivot shaft 52 for the purpose of adjusting it relatively to the chute and other parts, and in order that itv may be held in its adjusted position the frame 25 has a long curved tongue 54 (Fig. 1) which is positioned adjacent the lug 55 outstanding from the frame 50i. The tongue 54 has a number of holes 5G through any one of which a bolt 57 carried by the lug 55 may be passed to hold the cutting mechanism in its angular-ly adjusted position.

The side walls (Figs. 1, 2, 5, 6 and 7) extend below the bottom wall of the chute and have inturned flanges: 58 (Fig. 6) at their inner edges. These flanges form suitable guides and supports for the frame 50 (Fig. and are preferably curved on an arc concentric with the arc of the chute so that the frame 50 may slide or shift bodily in a corresponding arcuate line of movement. The mechanism for driving the cutting chain and for bodily moving said cutting mechanism in its arcuate path is carried on this sliding or shifting frame 50. The frame in general consists of a plate positioned between the depending chute walls and curved to conform to the curvat-ure of the chute or guiding structure. The frame 50 carries a suitable source of driving power such as an electric motor 60, which, as seen more clearly in Fig. 7, spans the frame 50. This motor has a pinion 61 (Fig. l) on its shaft which drives a gear G2 keyed on a main shaft 63. The shaft 63 extends centrally lengthwise of the frame and is journaled in bearings 64 carried on said frame. clutch member 65 is. slidably keyed to the main shaft 63 and cooperates with -another clutch member 66 which is loosely mounted on the shaft 63 and which is formed at its end as a bevel gear. This gear meshes with and drives a correspondingly beveled gear 67 on the shaft 52. This beveled gear 67 in turn transmits ,reachedv the end .of itsforw-ard stroke.

vpower to another beveligear `68 which is Carried .einx `ashort shaft 'V69 *ljournaled yin the 'rear Side? et .the cutting mechanism 'iframe 25 ."(Figs. '1, 2, 7, and 8). .The power Vfor k66, yand y68 provides a suitable driving connection for the transilnittal of power at `,anyl angle to whichthe cutting mechanism isadjusted about the pivotal shaft 52. The "clutch member may be manipulated in any snitafblefmanner for vthe purpose and .provides a simple Aa-r'rangeme-nt 'for connector disconnecting the cutting mechanism .fi'vm'the SiO/uwe' otpOW-ei as' Well. In the drawings'' have sho-wn means for automatically 'acting `sai'dfclu'tchv to stop the. cutchain when'th'e cutting .mechanism has e A lons'levr '65@L v(Fit-il 7). is nivo-,ted at 65h on theoframe 50. This lever extends across to lthe ,other"side of the frame. It engages the clutch 65 so:A that when the lever isswiiiging on'itswpivot it will throw the clutch one way or the other to connect or disconnect the cutting chain. A long link 65C is pivotally connected to the free end of the lever 65El ande-tone end it has a hook 65d which is adapted to strike afixed stop 65e on the chute wall .when ther cutting mechanism reaches the lowerend of its forward stroke, thus throwingfthe clutch 65 and disconnecting the cutting chain from the source of power. Thestop 65? may, if desired, be adjusted` to properly time the stopping of thel chain, To start ythe cutting chai-n again theA operator simply needs to grab the hooked end `65dfof the link 65c and operate the clutch` 65, kThe power of shifting or moving theA 'fl'ilrlel 50 and the cutting mechanism ink their arcuate vline of movement may be and preferably is derived from vthe main shaft Loosely mounted on the shaft 63 near its rearend is a driving pinion l. (Fig. 8) which may be Actmnected with or rdisconnected'. from Said shaftk at will by means of a suitable clutc`h72. This gear meshes with a` larger` gear 73 on a shaft 74.-' whichy is parallelv with the shaft 63, and when the 'pinionl is connected with the shaft 63 yby the vclutch 72 it'will drive the vgear 73 `and vshaft 75l. The latter] shaft carries a worm 7 fwhihidrives .a 'corresponding worm gear 76.(Fm, ilona transverse `sliaift'77. This shaft 77issuitably journaled in the frame 50 :and carriesfat its outer ends a pair of pinionsy78 whichmesh with cortoothed racks 7 9 secured to the under side at the bottom wall of the chute l?) as clearly shown in Figs. l and 2 and which curved to conform to the curvature of the chute and the arc on which the cutting mechanism moves. This construction enables the frame 50 and cutting mechanism B to be bodily shifted or moved in its arcuate path or line of movement in a very simple manner andy the clutch 72 enables the power to be connected with or disconnected from this mechanism at will. The provision of the worm and worm wheel 7 5 and 76 also has the advantage of holding, if desired, the cutting mechanism B and `frame 50 inl any position to which it may be fed forward orl returned. These parts are so proportioned that the cuttingmechanism will be fed forward or advanced on the cutting stroke at the proper speed for cutting the kerf. In a machine of this character', however, the speed of operation is, of course, an important desideratum, hence it is desirable, after the Vblock has been cut ,`to withdraw or returnthe cutting mechanism at a greater speed than the speed at whichl it was fed forward on its cutting stroke. For this reason I provide a large internally toothed gear 86 (Fig. 5) on one end of the shaft 63 (Fig. 2) which is adapted to drive a correspondingly smaller gear S7 (F 8) on the shaft 74 for increasing the speed. This large gear 86 is loose on the shaft 63 but it maybe yconnected with y When it occupies a neutral or intermediate position neither gear 7l nor gear 86 will be connected with the shaft 63. ln the drawings I have` shown mechanism by which the clutch 72k can be automatically thrown to stopr the movement of the cutting mechanism at each end of its stroke. On the frame (Figs. l, 2, 7 and 8) l journal a rock shaft 72a the inner en d of which has an arm or lever 72".` The end of this arm engages the clutch 72 and when the shaft 72ais rocked in either direction the clutch will be shifted accordingly. This shaft also has anr arm 72C at its outer end which is adapted to strike either of the two fixed stops 72d, one of `which is positioned on the wall of the chute at points corr-esponding to each end of the stroke of movement of frame 57,0 and cutting mechanism. rAs the arm 7,2C strikes either ofthe stops 7 21l itthrows the vclutch to neutral position and automatically ystops the movementI of the cutting mechanism. The operator may then start the mechanism again by operating the arm 72C manually. Later I will describe mechanism by which the chute or receiving structure 19 may be cleared of blocks when it is desired to stop the cutting operation or remove the machine from the mine or shift its position and in connection with this clearing out mechanism it is desirable that a quick forward stroke of the cutting mechanism be possible. This quick forward stroke is accomplished by simply providing` another gear 80 on shaft 63, and another clutch 33 for connecting said gear 80 with and disconnecting it from said shaft. This gear 30 when connected with shaft G3, drives a small pinion 81 (Fig. 7) on another shaft 82, which shaft has a pinion 85 (Fig. 8) meshing with the internal gear 86. Thus the power will be transmitted directly from the shaft 63 to the shaft 74 through the internal gear 86 and the pinion 87 and the proportion or ratio of the gears 86 and 87 will be such as to drive the transverse shaft 77 at a greater speed than the other driving connection above described for feeding the cutting mechanism forward. 0f course, when the internal gear 3G is connected with the shaft 63 by the clutch 72 the gear 80 must be disconnected from said shaft and the pinion 71 will necessarily7 be disconnected. In other words. by the proper manipulation of the several clutches the various speeds and direction of operation of the cutting mechanism may he readily obtained.

It is thus seen that on the forward stroke of the cutting mechanism B the kerfs 3 and 4 are cuton curves or arcs corresponde ing to the arcuate line of movement of said cutting mechanism and to the arc of curvature of the chute or receiving structure 19. The cutting mechanism on its return stroke is utilized to remove the block of coal which has thus been severed or cut from the vein. Said cutting mechanism operating on its return stroke to carry the block of coal in the curved line of movement of said cutting mechanism. In this manner, and as clearly shown in the drawings, the block of coal enters the open forward end of the chute or receiving structure 19. the cutting mechanism it is thus projected or positioned completely within the end of the chute 19 as shown clearly in the drawings. If the chute 19 and cutting mechanism have been rotated to such position that they are operu ating upwardly, so to speak, that is, so that the cutting mechanism on its cutting stroke moves upwardly toward the roof of the mine, it is readily seen that the moment the block ofk coal is released from the mass it will drop into the upturned end of the chute 19 by gravityand each succeeding severed block will thus in :ill probability force the preceding block further along the chute. In the event, however, that the machine is operating in thel positions shown in Figs. 1 and 2, that is: with the curved end of the chute pointing downwardly, it will easily be seen that the severed block of coal must be tentatively held in the end portion of the chute until the next succeeding block forces it further back into the chute. In the machine shown (Figs. 1 and 2) I provide a simple means of tentatively holding the severed block in the end port-ion of the chute. This means consists of a beveled hoolr. 90 which is positioned at the lower inner edge of the chute and normally stands 'f' in the path of the block entering said chute. The entering block while passing into the chute deflects the hook 90 but the hook 90, being mounted upon a spring arm 91 which is anchored to the wall of the chute, will spring in behind the block of coal after said block has completely entered the chute 19, as lclearly shown in Figs. 1 and 2 of the drawings, and thus hold the block of coal tentatively in that position until the next. block forces it. farther along into the chute. Each block is thus held against dropping out of the chute by gravity and relieves the cutting mechanism of said block while it moves forward, cuts another' block and returns.

rIhere are several ways in which the cutting mechanism can be arranged to engage the block of coal after said block is cut for the purpose of lifting or removing said severed block. This depends to a great extent upon conditions. For instance, where the line of cleavage lis well defined and a reasonably light force is required to pull or break the block away from the line of cleavage after the kerfs 3 and 1 have been cut I provide a couple of gripping fingers or pawls on the cutting mechanism frame. These devices may occupy the position indicated at. C in Figure 2 of the drawings. That is to say. they are mounted on the inner faces of the cutting mechanism frame 25. Fig. 1'( illustrates in a large detail one of these grippers. A pawl 92 is pivoted at 93 in a suitable recess in the frame 25 and its free end projects into the path of the coal through the frame. This pawl is yieldingly held in this outstanding position by spring 94.-k which spring is removably held in position by a screw-plug 95. The gripping pawl 92 is inclined in such direc-tion that on the forward stroke of the cutting mechanism it will yieldv and thereby' be pushed into its recess by the block of coal.V

On the return stroke of the cutting mechanism, however, the sharp free end of the pawl will dig into or grip the side of the bloclrof coal and the cutting mechanism will thereby operate to remove the severed blocks. Any number of these grippers mayl Lin ,levees provided `according to eonditions. As

before the description of my improyjedj method, it sometimes happens that theline, ogfjoleavae'e is more `or yless irregular nd indefinite and undersucli vconditions it isnotwell to lrely' yupon applying a force to the bleek offcoul vto break it `away afterthe Sand 4 are out. It is advisable on the other hand to out thekerf 12- so as to .oomprletely, severthe block of coal from the body ,or niassthere'of. Accordingly I providezi'n underoi meohanism for this `purpose and, as will latereppear, not only utilize nieohenism o for underoutting Vor .outting -tlieglgerf 12, but also utilize it to assist the out/tingmechanism B in removing .the block AOfooal lich-hasgbeenfout.`r In aoeordanoe `*with-i.theseiobjeotls `I Eprovide a y,frame D whieli ,puroieetsfforward from the The ,sub-frange 18 (Figs. 1, 2, 5 'and L6) flies ilitill'ned rerbelly Ydisposed Hessels 100 on ,opposite sides which iit within Corresponding grooves in :the edges 1,01 of ysaid fame D S0 `that said frame D lmay be yertieally shifted, for the purpose of adjiistiiigwthe cutting mechanism which is Asupported by this lrame and which will be later' deseribedl VA simple mea-ns of adjustying'this fra'rneand'holding it in its adjusted rposition comprises an outstanding;` lug; 102 2) on vsaid sub-frame 18 through v,wliioh luga yertieally ,disposed adjusting bolt 'lQfpasses o This bolt also passes through a cross barlOt on the frame D and lhas its headlfon theiunder side saidr eross'bar. A nut 105 threaded on to the bolt on each side ol thejlug 102 so that by turning; the nuts and bolt relatiiely the :height roi the ,trame may be determined. 'The frame D has two spaced arms 106,projectingftorii'aijdly and at their outer ends theyy Carry a transverse I`shaft 107 whiehserves las n pivot Vfor the swinging Cutting ymechanisno E 2)@ :Piyotally mounted lon the pivot shaft 1,07 is a swinging frame which comprises theA two parallelV side bars 108 v(Fig. 6) and, .the transverse end me-mher The "side bars 108 of this frame aregrooved `on their inner Ylaces and pro- Videv guideways ifory a `frame 110 which *o periphery or edge of said iframe F andk the lframe has,`at its outer corners, .a couple of rollers 112 over whi'ehfthe chain passe-s.

The cutting' Chain may be `of any suitable `emistruetion and needs no partieulandescription. rl`he inner or` rear end'otthe Chain passes around 'a suitable sprocket 113 which is mountedxupon the end oi? a vertically disposed 'she-ft 114- .whih has a suitable journal inl-the Aifu'ne 110. This shaft" ycarries af beveled gearfll `at its upper fend which meshes with andfis driven by a kvCorresponding'gear 1x16 lieyed on the end of ashai't'll? journaled infys'iiitable bearings in theirame 110,l` A't' its rear end this shaft Carries a large gear "118 which is driven a .pinioni'llQbnthe shaft ,oit a motor 120whieh is moun,ted on sliding yframev 110.l In this. manner power is Supplied from the `mo`to`r`120 to theyeuttingphain 111 for the'"purpose` of driving )said Ioliain' "In order to" 'the uiidiereutting meeliianism E into ythefoeil;sfo thet it vwillfoutthe lerf @refrains-"1110 whioh carries sa-id cutting mechanism ,is mountedto slide in the'swingingframe. I proiiide ine-ans vby whiehthis `'shii1-tingy loi! diiterent sjiieeds thatsaid (hittingv .mechan nism canfbe vkgiyenv a slow forwardy Qiittiiig stroke and `a q iiielrret-iirn stroke. "In QFifis. l, 2 andf it willbe obseryed. Kthat `rtheshit 117 has a drivingpinion 121 thereon( flfliis pinion is loose on theshei't but isy adapted to he eoijineeted lwith or disconnected from seid vshaft by means: of a clutch When oonneoted with vthe shaft by vthe clutch this pi1iiondriyes a larger gear 123 12) qon anothershaft 124fwhioh earriesaA worin IVlfliis `worin meshes with a Correspond ing?r vworm gear on la Atzransyerse Thezshaift 125 Carries a pair of pinions 12T al; its outer ends which mesh Awithto(itin-sd racks 12S formed witliiinthe'grooyes vor `channelsoil the side bars lOSfof theswinging fir-fame so thet when the eiwit/126A is'r'otated the fre-me ,110 and' cutting' mechanism l' willbe shifted flong'itudinally'` of said swinging` frame. llh'ese",driyiiigL eonneetions `which l have just desribed are intended to feed the Cutting "mechanism ii" ii1zififcl at a slow speedfmhe returnstroke Voct' said Cutting Lmechanism is preferably quiolier :than `the forward stroke and this higher speed is'obtained by proyidiiigian internally toothed large gear 131 lo"A e` on the shift 1,17'v but acl-raptedl .to Kbe eo ielcted with or disconnected "from seid sha t 'bythe Clutch 122. This gear drives@ Asmall pinion'lO (Fig. 6) on'the shaft194i, hence when the pear 131 is"'di.'iyingy the; shaft `1124 the eutt-lincy mechanism will ybe'.returned fat a relatiy;y ly higher speed. `rIhe 'e'liitehflQUQE as ,be/fore intima-techie eA ytwo-'wayelirteli for eonnectiiig` either the 181 Aor'nthle gear 121 with Vsaid shaft 117, and inorderihat the operation of this @lute-h bev antomet@ te @heuse Sess-ds et lie. @eof @seh Athe' .cutting` mechanism E ,can be doiieyat -.9

stroke I provide. an operating lever 133 pivoted at 134 on. the frame 110 and connected at 135 to the clutch 122 for shifting the clutch in either direction on the shaft 117. The free end of this lever is positioned to engage stops 136 at each end of the stroke or range of movement of said cutting mechanism so that the lever 133 in'striking either one of these stops will. change the speed and direction of movement automatically. The lever has an outstanding arm 137 by which it may be manually operated, if desired.

In practice I prefer to operate the cutting mechanisms B and F1 simultaneously; that is to say, while the cutting mechanism B is moving in its arcuate path to cut the kerfs 3 and 4 the other cutting mechanism E.will also be cutting the kerf 13, hence when the cutting mechanism B reaches the lowerA end of its stroke it will practically meet the cutting mechanism E. In this position of the cutting mechanisms I interlock both of them so that on the return stroke of the cutting mechanism B the cutting mechanism E will also be lifted or swung about the pivot shaft 107, as shown in Fig. 2. The interlocking of these two cutting mechanisms may be accomplished in any desired manner. In Figs. 1 and 2 I have shown a simple way by which this may be done. The frame 25 of cutting mechanism B carries a spring-pressed hook 140, which is pivoted at 141 and which engages an undercut shoulder 142 on the frame F of the cutting mechanism E when said cutting mechanisms meet. The cutting mechanism E will therefore be carried with the cutting mechanism B on the return stroke thereof, and since said cutting mechanism is beneath the end of the severed block it will serve as a platform or a support for said severed block and operate to lift the block. As soon as the block has been raised or carried into the end of a receiving chute 19 and caught by thehook as before explained, the cutting mechanism E must be released so that it can return to its normal position. In the structure shown this is simply accomplished by providing an arm 143 on the pivot shaft 141 of said hook 140, which arm 143 will engage a fixed lug 144 on the chute 19 (Figs. 1 and 2), hence when the arm 143 strikes the lug 144 it will unlock the cutting mechanism E and allow it to return. When the machine is operating in the positions shown in Figs. 1 and 2 the cutting mechanism E after being released will swing or drop down to normal position by gravity, but in order that its drop may not be too sudden and hard the mechanism may be balanced or practically balanced, if desired. I-Iowever, I provide on the end of the pivot shaft 107 a segmental arm 150 which has at its outer end a curved surface 151 formed on per end of the rod 156 so that an increased force may be applied manually to the brake shoe. The rear end of the segmental arm 150 is upturned as at 159 so as to provide a stop lug which engages the brake shoe 152 and limits the movement of the cutting mechanism to properly position said cutting mechanism at the end of each return stroke. If desired this stop may be made adjustable, as shown in the modification in Fig. 18. In

this form the stop 159 is separable from the segmental arm 150 and may be adjusted along the arc-shaped surface 151 and held in its adjusted position by the bolt 160.

When the machine is operating toward the roof of the mine, that is, when the operating parts are in just the reverse position that they are in Figs. 1 and 2, it might happen that the cutting mechanism E will not swing upwardly toward the roof and return to its cutting position after it is released from the cutting mechanism B, and in order to insure its proper return I provide a crank arm 165 on the end of the pivot shaft 107 and a spring return mechanism is connected to the end of this crank arm 165 and to the framel at` 166 (Fig. 6) for the purpose of swinging the cutting mechanism E upwardly. This spring return mechanism may comprise a tubular lportion 167 which is pivoted at 166 to the frame D, and a rod 168 which is pivoted to the crank arm 165. The inner end of the rod 168 has an enlarged head which slides in the tube 167 and between this head and the inturned end of the tube 168 is a spiral spring 169 which will be compressed when the cutting mechanism E is swung downwardly by the cutting mechanism B, and this spring acting upon the crank will return said cutting mechanism E when released from the cutting mechanism B. The tubular portion 167, together with the piston therein, constitutes a dash-pot pivoted at 166, the piston being constructed in a well known manner to permit free movement when the kerf cutter F is lifted and retarded movement when the spring 169 restores the plane kerf cutter to initial position. If desired the bottom of the dash-pot may be provided with an opening controlled by a check valve so that the piston may move freely when the kerf cutter F is restored to initial position.

I have previously mentioned that `a quick forward and return movement of the cutting mechanism B is desirable when the' Cil f Lci ally to chute is to be cleared of coal, and described driving connections by which this qiuclt return speed 1s accomplished. y1n the present `structure the clearing-out mechanism embodies tivo long arms Gr (Figs. 1, 2, and 11) which are. pivotally fastened at 170 to the cutting mechanism trame andivhich extend into the chute 19 `tor a considerable distance, preferably a distance equal to substantially tivo lengths 4ot bloeit.y These clearing arms are spaced from the sides oi' the chute and from the blocks of coal Within the chute .but they have a number of instanding prongs 171 Which are inclined in the direction in which the blocks move through the chute. The arms areV curved i-n conformance with the curvature ot the chute rand in order that they may properly liollovv a curvedline, that is, move in a curve in aligmnent- Withthe arc. of movement of the cutting mechanism, 1 provid-e a couple of guidevvays 172.011 the inner side Walls of the chute 19. In these guidevvays slide the shoes173. These` shoes carry outstandin studs 174 which pass loosely through holes in the arms G and a cross pin 175 is provided to prevent the arms from becom- .lng .separated from these studs. Between the shoes and the arms G are spiral springs 1T@ 'ivhich not only yieldingly press the Aprongs. 171 against the blocks of coal in the chute but which also hold the shoes Within the guideivays.y By oscillating or 'bodily moving the cut-ting mechanism B the arms `will be' given a reciprocating` movement and the prongs carried by said arms will engage-the blocks oi coal and carry them past the' tenter ot the chuteso that they Will drop through the rear end of the chute by gravity. f. l In Fig.- 21 of the drawings I have illustrated in side elevation a modified structure (-si'nbodying my invention. This particular i'orin of machine is intended more espebe used for cutting the upper 4blocks of coal; that is, it operates to cut the hei-'fs il and 1'r which extend upwardly toward the root of the'mine. ln this structure iiitead of building a closed guiding chute or receiving structure, as previously explained, l-build up an open chute or re- "ng structure. T his structure comprises a `bottom curved guideivay or trough made upr of spaced parallel angle beams 180 'termed to the proper curvature and vftrengthened by a. :number of transverse blaces 181 distributed at intervals. Resting onfthe inturned flanges of these beams is a plate 180 Which forms the bottom oi the trough.-` A number of uprights 182 are provided on each side of the guidevvay and upon ivhieh Athe guideivay is supported.

rrlhese uprights a-re anchored at their lower ends to a base trame 183. The intermediate pair ci uprights are spanned at their upper mechanism mounted thereon and the cut-y ting mechanism` also carried thereby are identical in construction with those mechanisms previously described `and hence need no further description. This construction, as is seen, is comparatively light in Weight andv occupies comparatively small space. It may be moved along the line in any suitable manner, the frame 183 being mounted upon skids 187 for this purpose. In order to prevent the rear end oit the machine from rising, due to the resistance offered to the cutting mechanismjivhile' it is cutting upwardly, lprovide a suitable vjack H which is pivotally anchored at 189 to each ofthe rear corners of the frame. Thisjack is of the screiv type operated by a hand Wheel 190 and is of Well known construction, hence it needs no further. description except that its upper end yis adapted to be jammed against the root et the mine to prevent the rear end of the struc-ture from rising. lt niav be desirable to supportthe block of coal While it is being cut and until it is completely cut and in the drawing (Fig. 21) I haveshoivn a simple means for doing this, On the forward end of the angle beam 180 I provide an adjustable plate 200 Which'has a longslot thro-ugh which a .bolt 201 passes and is threaded kinto the beam so that the plate may be secured in its adjusted position. This adjustable plate carries a lever Which is iivoted at 202 on said plate. One arm 203 voi 'thisy lever is enlarged at its lend to provides suitable head and is adapt- K mechanism so as to allen7 said cutting mech anism to enter the upper end ot the structure. y

The structures which I have described are shownV as mounted upon skids so that the machines may be jacked along theiloor of the mine in the usual ivay Well known in the art. lf desired, however9 theentire machine may be mounted'upon a Wheeled or rollered truck 195, such as illustrated diagrammatically in Fig. 20. By mounting the machine on a truck in this mannerl 1t may, if desir'ed, be arranged to swing bodily on a vertical axis, it being simply necessary' in such case to provide the frame with a pivotal bearing or journal 197 in the truck. A vertical adjustment of the entire machine may also be secured by means of a bolt or screw 198 adapted to operate against. the lower end of the bearing member 196.

That I claim is:

1. 1n a mining machine, the combination with a supporting frame, of core cutting mechanism mounted thereon in position to cut a core from the face of a mine wall in any direction toward a boundary thereof, means for operating said core cutting mechanism to cut such core in any direction. toward a boundary of the coal face, and means for removing the cut core of material.

2. The combination of a cutting mechanism for entirely severing a block of coal from the vein, means for bodily actuating said cutting mechanism to remove the severed block of coal while the latter remains: intact, and a curved chute disposed in the line of movement of said cutting mechanism for receiving the block of coal from said cutting mechanism.

3. The combination of a bodily movable cutting mechanism for entirely severing a block of coal from the vein, means for lfterward moving said cutting mechanism to remove the whole block intact which it has severed, and a curved chute disposed in the line of movement of said cutting mechanism and into which the cutting mechanism discharges said block.

1i. The combination of a bodily movable cutting mechanism comprising a core-cutter and a plane kerf-cutter for entirely severing a block of coal from the vein, means for afterward moving said cutting mechanism to remove the whole block intact whichit has severed, a chute disposed in the line of movement of said cutting mechanism and into which the cutting mechanism discharges said block, and means for holding said severed block in position to be moved along the chute by the next set of blocks.

5, The combination of a bodily movable cutting mechanism for entirely severing a block of coal from the vein, means for moving said cutting mechanism to remove the whole block intact which it has severed, an arcuate chute disposed in the line of movement of said cutting mechanism and into which the cutting mechanism discharges said block, means for holding said severed block in position to be moved along the chute by the next set of blocks. and means operated by said bodily movable cutting mechanism for clearing the chute of severed blocks.

The combination of an oscillating cutting mechanism adapted on its forward stroke to entirely sever a block of coal from the vein, means operable on the return stroke of said cutting mechanism for removing the severed block in its entirety, an arcuate receiving structure disposed coincident with the line of movement of said cuttin mechanism for directing the blocks of coa beyond said cutting mechanism, and means tor tentatively holding the last block severed by said cutting mechanism in position to be moved along said receiving structure by the next severed block.

7. The combination of a frame structure, a guiding structure disposed on an are and extending substantially from the forward to the rear end of said frame structure, a cutting mechanism operable adjacent the forward end of said guiding structure and bodily movable on an are, the center of which is coincident with the center of the are on which the guiding structure is disposed, said cutting mechanism operating on its forward stroke to sever a block of coal from the mass thereof, and means operable on the return stroke of said cutting mechanism for removing the severed block and placing the severed block on said guiding structure in position to be shoved along said guiding structure by the next severed block.

8. The combination of cutting mechanism movable in an are for entirely severing a block of material from ythe mass thereof, means for bodily moving said cutting mechanism to remove the severed block, and a receiving structure disposed on an arc the center of which is at the center of the arc of movement of said cutting mechanism for receiving the blocks as they are removed by the cutting mechanism to direct said blocks be yond the cutting mechanism.

9. The combination of cutting mechanism for entirely severing a block of material` from the mass thereof, means for bodily moving said cutting mechanism to remove the severed block, a receiving structure disposed on an arc the center of which is at the center of the are of movement of said cutting mechanism for receiving the blocks as they are removed by the cutting mechanism to direct said blocks beyond the cutting mechanism, and means for bodily rotating said receiving structure and cutting mechamsm about a common axis.

10. The combination of a main supporting frame, a sub-frame rotatably mounted on said main frame, a cutting mechanism pivotally mounted on said sub-frame on an axis transverse to the axis of rotation of said sub-frame and adapted on its forward stroke to sever a block of material from the mass thereof, means operable upon the return stroke of said cutting mechanism for removing the severed block, and an arc-shaped chute disposed in arcuate alignment with the arc of movement of said cutting mechanism and having its end in position to receive the removed block from said cutting mechanism.

11. In mining apparatus,the combination with kerf cutting mechanism for cutting blocks of material from a mine wall .beginning intermediate the lioor and roof of a minechamber, of means for operating said cutting mechanism including the feed thereof either horizontally or upwardly toward a boundary of the mine wall, and means for removing the blockr of material along the line of movement of said cutting mechanism.

12. In mining apparatus, the' combination with core cutting mechanism, of means for operating the same including arcuate feed thereof to cut a core in a mine wall toward the floor, roof or 4one of the opposite walls of a mine chamber, means for adjusting the position of the cutting mechanism on an approximately horizontal axis to adjust the direction of feed of said cutting mechanism, and means for removing` the core of material in arcuate alinement with the directionV of feed of said cutting mechanism irrespective of its adjusted position.

13. The combination of kerf cutting` mechanism having an unobstructed coreopening therethrough and bodily movable on a curved line for cutting out a block of coal from the vein, means for removing said block of coal'along said curved line, and means comprising a curved chute for tentatively holding the block in the path of the next succeeding` block.

14?. The combination of a curved receiving structure', means for entirely severing a block of coal fromv the vein thereof, and means for tentatively holding said block in said receiving structure in position to be pushed along saidfreceiving structure by the nent succeeding block.

15. r1`he combination of bodily movable cutting mechanism adapted on its forward stroke to entirely cut'a block of coal from the vein, means operable on the return stroke of said cutting mechanism -for removing the block which has been cut, means for directing the blocks from said cutting mechanism as they rare cut, and mechanism for supporting the aforesaid parts to enable cutting horizontally or vertically.

,16. The combination of bodily movable cutting mechanism adapted on its forward stroke to cut out a block of coal from the vein, means adapted tooccupy a stationary position during the feed of said'cutting mechanism but operable on thereturn stroke of said cutting mechanism for removing the block which has been cut, and a stationary guiding structure aligned with said cutting mechanism for directing the blocks of coal away from the cutting mechanism.

17. The combination of bodily movable cutting mechanism adapted on its forward stroke to cut a block of coal fro-m the vein, meansoperab'le on the return stroke of said cutting mechanism for removing the block which has been cut, a relatively stationary structure having an elevated receiving end for directing the blocks of coal from `said cutting mechanism, and means for tentatively holding' said block of coal in said `receiving structure at substantially th'e end of the return stroke of said cutting mechanism and in position to be shoved along said receiving structure by the succeeding block.

18. In a mining machine, the combination with a supporti-ng frame, 'of an enclosure having a receiving opening, an open cutting component mounted directly on and movable around a portion of the enclosure for cutting coal and other material from columns directly from a mine vein, the'cut columns of coal or other material being` injected into said open end of said enclosure, and means for operating said cutting component to cut the coal as aforesaid.

19. The combination of a loop-shaped cutting mechanism arranged to simultaneously cut a. plurality of kerfs at an angle to each other to entirely severa block of coal from the vein, means for'bodily moving said cutting mechanism to remove the block of coal from its original relative position, and means, embodying a receiving chute, positioned in alignment with the line of movenient of said cutting mechanism for directing the block of coal away from said cutting mechanism. 4

20. The combination of bodily movable cuttingv mechanism embodying cutting means for cutting al plurality of kerfs" angularly disposed withv respect to each other, and adapted to embrace the block of coal as it is cut; additional kerf-cutting mechanism to entirely sever the blocks of the cut material, mean-s for bodily reciprocating both .of 4said hert-cutting mechanisms, means operable on the return stroke of said cutting` mechanisms for rem'oving'the block from its original position along the line of vmovement of the first-named cutting mechanism, and a receiving structure aligned with said first-named cutting mechanism for directing the block of coal away from the cutting mechanism.

21. In mining apparatus, the combination of bodily rotatable core cutting mechanism adapted to be positioned in various angular positions with respect to the wall of material to be cut, and means for operating said cutting mechanism vincluding 'the feed 'thereof in any radial directions from the center yor adjustment of said angular relation.

22. In miningapparatus, the combination with a supporting frame', of cutting mechanism bodily rotatable on a horizontal longitudinal axis and mounted on said supporting frame in position to occupy various angular relations with respect to the mate- 

